Geometry Distortion Occurring in USDZ Import in Isaac Sim (Distance from World Origin Related)

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GPU Information

  • Model: NVIDIA GeForce RTX 4090
  • Driver Version: 581.08- Released

Topic Description

Detailed Description

We are currently testing LCC-based 3D reconstruction data exported as USDZ and imported into
NVIDIA Isaac Sim.

After internal engineering review, we confirmed:

  • LCC reconstruction data is intact
  • PLY export functions normally
  • Distortion/blurriness occurs only in the USDZ export
  • The issue becomes more severe as the geometry is farther from the world origin

This suggests that the problem may be related to USDZ conversion or the downstream interpretation within Isaac Sim rather than the core reconstruction data.

Error Messages

Screenshots or Videos

Additional Information

When the data was exported in the LCC format, no issues were observed.
However, after converting the same dataset to USDZ, the distortion/blurriness appeared as shown in the attached image.

The same dataset displays correctly when exported as LCC or PLY, and the issue only occurs when the data is converted to USDZ.

Therefore, it appears that the problem is not related to the original LCC reconstruction data but may be associated with the USDZ conversion process or the way the USDZ file is interpreted by the downstream platform.

What I’ve Tried

Related Issues

Additional Context

What happens if you reopen the problematic USDZ file in the original export application and inspect it there?

If it still looks distorted in that app, then the issue is likely in the USDZ export itself. If it looks correct there but broken only after import into Isaac Sim, that points more to an Isaac Sim import or interpretation problem rather than the export pipeline.

Closing due to inactivity. To isolate the issue, we’d need to know whether the USDZ file looks correct when reopened in the original export application. If the distortion only appears in Isaac Sim, it would point to an import/interpretation issue. The distance-from-origin correlation could suggest a floating-point
precision problem in the USDZ conversion. Feel free to reopen or start a new topic with the results of that check if you’re still experiencing this.